Keyscan CA250B User Manual

Keyscan Inc. – Technical Guide (PC109x - 04.15)
13
Cables
The following table outlines system cable requirements. Please be sure to review grounding guidelines for safe
system operation. Avoid running access control cables parallel with AC wires or across fluorescent light
fixtures. This can cause AC induction or transmission interference.
Table 1 – Cable Requirements
Device / Circuit
Board
Signal
Protocol
Maximum Distance
Cable Type
Notes
Readers to ACU
(includes HID iClass
– Rev B & Rev C)
Wiegand
500 ft / 152.4 m
6 conductors
shielded 22 AWG
Overall shielded cable
accepted. CAT5 cable not
acceptable with Wiegand
signal protocol.
Exception Readers to
ACU – PX-620, HID-
5375, MR-10, MR-
20, HID-iClass (Rev
A), iClass KEYRK40
and elevator readers
Wiegand
500 ft / 152.4 m
6 conductors
shielded 18 AWG
Overall shielded cable
accepted. CAT5 cable not
acceptable with Wiegand
signal protocol.
Door strikes &
electro magnets to
ACU
n/a
500 ft / 152.4 m
1 pair 18 AWG
Shielded wire not required.
Contacts & exit
devices
n/a
500 ft / 152.4 m
1 pair 22 AWG
Shielded wire not required.
Motion sensors (PIR)
n/a
500 ft / 152.4 m
2 pairs 22 AWG
Shielded wire not required
CIM
CAN Bus 1
3280 ft / 1000 m @ 9600 BPS
3280 ft / 1000 m @ 19,200 BPS
984 ft / 300 m @ 57,600 BPS
262 ft / 80 m @ 115,200 BPS
CAT 5 – 2
twisted pairs
Maximum overall distance
between first and last CIM
units
PC to ACU or
NETCOM (direct
serial)
RS-232
100 ft / 30 m @ 9600 BPS
49 ft / 14.9 m @ 19,200 BPS
26 ft / 8 m @ 57,600 BPS
9.8 ft / 3 m @ 115,200 BPS
5 conductors 22
AWG shielded
Overall shielded cable
accepted. CAT 5 cable not
acceptable with RS-232
signal protocol.
WIEEX2 (Wiegand
protocol extender)
n/a
4000 ft / 1219.2 m
CAT 5 – 1
twisted pair
communication.
1 pair 18 AWG
power to TX.
If powering transmitter
locally, 18 AWG power
wiring is not required. Kit
includes 1 transmitter & 1
receiver.
Grounding
Ground all access control units and shielded cables to a cold water pipe. For multiple access control units, all
shields should be connected to a single point earth ground.
It is important to ground the shields of the readers and communication cables to a single point cold water pipe
at the access control unit. Failing to ground the shields or using incorrect cables may cause noise or
interference and result in improper card reads.
Important
Ensure the chassis ground (GND) on the DPS-15 is connected to the metal enclosure ground lug.

Keyscan CA250B Specifications

General

Brand	Keyscan
Model	CA250B
Category	Controller
Language	English